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Scotts #1501
U.S. #1501
8ยข Transistors and Printed Circuit Board
Electronics Progress Issue
Issue Date: July 10, 1973
City: New York, NY
Quantity: 159,775,000
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
Perforations: 11
Color: Tan and multicolored
Another salute to electronic progress, this issue commemorates the invention of the transistor by Bell Telephone Laboratories in 1948. The transistor made miniaturization possible and opened the door for production of pocket radios and computer parts.
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